Final answer:
The sternocleidomastoid muscle originates from the sternum and clavicle, inserting on the mastoid process, facilitating head movement and rotation.
Explanation:
The sternocleidomastoid muscle originates from the sternum and clavicle and inserts on the mastoid process. It plays a crucial role in flexing the head and also aids in some rotation.
Learn more about Muscle Anatomy here:
https://brainly.com/question/30760441
